Typewriting-machine



J. B. HOLDEN.

TYPEWRITING MACHINE,

APPLICATION FILED JAN.I3, 1920.

Patented Aug. 2, 1921.

2 SHEETS-SHEET 1- INVENTEIR WITNESSES 1am HIS ATTSRNEY J. B. HOLDEN.

TYPEWRITING MACHINE.

APPLICATION FILED JAN.I3,1920.

Patented Aug. 2, 1921.

2 SHEETS-SHEET ami om w G mmml HIS ATTORNEY" WITNESSES UNITED STATES PATENT OFFICE.

3083 23 3. HOLDEN, OF U'IICA, NEW YORK, ASSIGNOB TO REMINGTON TYPEWRITER COMPANY, OF ILION, NEW YORK, A. CORPORATION OF NEW YORK.

TYPEWRITING-MAGHIN E. I

Application filed January 13, 1920. Serial No.

T 0 all whom it may concern;

Be it known that I, JOSEPH B. HOLDEN, citizen of the United States, and resident of Utica, in the county of Oneida and State of New York, have invented certain new and useful Improvements in Typewrlting-lVl'achines, of which the following is a specification.

My invention relates to typewriting Inachines and more particularly to case shifting mechanism'and to certain features of construction and combinations of devlces that enable the carriage as a whole and some of its associated parts to be readily detached from and replaced as a single unit 1n the machine.

To the above and other ends which w ll hereinafter appear my invention consists in the features of construction, arrangements of parts and combinationsof devices set forth in the following description and particularly pointed out in the annexed claims.

In the accompanying drawings wherein like reference characters indicate corrc sponding parts in the various views, 7

Figure 1 is a fragmentary fore and aft vertical sectional view of one form of typewriting machine embodying my invent1on.

Fig. 2 is a skeletonized side vlew of the same aS seen from the opposite side of the machine, and showing the platen locked in the upper case position.

Fig. 3 is a detail, detached, fragmentary plan view of the detachable section of the shift frame and some of the parts carried thereby.

Fig. 4 is a detail fragmentary plan view showing a portion of the section of the shift frame which carries the detachable section and remains in the machine when the detachable section is removed.

Fig. 5 is a detail fragmentary perspective view showing the two sections of the shift frame united.

In each of the figures parts of the machine are omitted, only so much thereof being shownas may be necessary to illustrate my invention in its incorporation there1n.

I have shown my invention embodied in the present instance in a small, compact, light, portable, top-strike machine of the character disclosed in the application of A. W. Smith, filed Sept. 27, 1919, Sr. No.

326,705. One of the purposes of the present invention is to contribute to the production Specification of Letters Patent.

of a machine having those characteristics whlch render 1t portable, but some of the Patented Aug. 2, 1921.

features of the invention are applicable or adaptable to larger machines.

The machine comprises an outer sheet metal inclosing frame 1, provided with feet 2, and in which is fixed a second sheet metal frame that supports various of the working parts of the machine and which may be removed bodlly with all of the working parts of the machine from the'inclosing frame. The inner su porting frame comprises sheet metal side p ates 3 united by a front comb plate 4 and other parts, not shown.

Supported by the inner frame is a sheet metal case shift frame comprising two sections, one of which is mounted on the supporting frame for case shift movement fore and aft of the machine, and the other of which is detachably fixed to the first mentioned sectlon and is Wholly supported thereby and wholly supports the carriage. The second mentioned section is designated as a whole by the reference numeral 5 and is shown detached together with some of the parts carried thereby, in Fig. 3. The other sheet metal section, to which the section 5 is detachably fixed, is designated as a whole by the reference numeral 6, and is shown in part and detached from the supporting frame in Fig. 5. v

The section 6 comprises two parallel side bars 7 arranged parallel with and close to the side plates 3. The side bars 7 extend longitudinally fore and aft of the machine and each is provided with an inwardly bent integral supporting flange 8 on which is mounted one end of the detachable section 5. The forward ends of the bars 7 are pivoted at 9 to the lower ends of parallel upright arms 10. These arms are fixed on a rock shaft 11 which extends transversely across the machine and is supported at its ends by the side plates 3. Projecting down ward and rearward from the flanges 8 at the rear ends of the bars 7 are integral parallel ears 12, pivoted at 13 to upright parallel links or arms 14. These links are pivoted at their lower ends by pivot screws 15 to the side plates 3, the sectlon 6 being thus mounted for movement fore and aft of the machine.

The detachable section 5 comprises a cross bar 16 having integral supporting brackets 17, the inner edge of each of which is turned 5 on the section 6 and prevent a relative lateral displacement between them. Suitable means are employed for fixedly, though detachably, securing the section 5 to the section 6. In the present instance headed screws 19 are received in openings 20 in the flanges 8 and are threaded into tapped openings 21 in the overlying brackets 17 firmly holding the. two sections together. Opp

sitely grooved carriage or gulde rails 22 are secured by screws 23 to the upper sides of the brackets 17. Anti-friction balls or rollers 24 are received in the grooved faces of the guide rails 22 and in the oppositely grooved guide ways 25 formed in a sheet metal base 26 of the carriage. This base extends throughout the length of the car riage and is provided at its ends with upright standardsor end plates 27 provided with bearings to support a cylindrical platen 28. The carriage is thus mounted and -wholly supported on the detachable section 5 of the shift frame to travel across the machine and to shift with the shift frame in the horizontal case shifting movements of the latter.

The carriage in its entirety recelving case shift movements, it is desirable to construct, combine and mount those parts associated or cotiperative with the carriage so that they may likewise partake of the case shifting movements of the carriage, thereby'simpli- .fying the construction and the connections between the parts. With this obj est in view the spring drum 29 by which the carriage is propelled in the direction of its feed is mounted on a detachable screw spindle 30 received at its threaded end in a tapped opening in the cross bar 16 of the detachable section 5. A cord 31 passes from around this drum and over a pulley 32, carried by one of the rails 22, to a-point of connection on the right-hand end of the carriage. A ratchet wheel 33 is connected by a sleeve to the inner end of the spring within the drum and coacts with a hand controlled detent 34 pivoted at 35 on the cross-bar 16, thus enabling an adjustment of the tension of the carriage spring to be effected.

The carriage is provided with a feed rack 36 connected thereto by pivoted arms 37 which are pivoted at 38 to bracket plates secured bysc-rews 39 to the base 26 of the carriage. The forward bent ends of these arms are secured by screws,40. to the feed rack. Each arm 37 is erforated to receive a pin 41 that projects rom the base 26 and is surrounded by a' coiled expansion spring 42. Each spring bears at its upper end against the associated arm and returns the feed rack to and tends to hold it in its nor- 1,aae,111

mal position, where its upward movement is limited by stop means, not shown.

The teeth on the upper side of the feed rack coact with feed dogs 43 and 44, such for exam le as those disclosed in the application of Bridgwater, Sr. No. 333,452 filed Oct. 27, 1919. These'dogs are carried b a dog carrier or block 45 adjustably fixe by a screw 46 on a rock shaft 47 which extends throughout the length of the section 5. The ends of the rock shaft arevmounted' on cone screws 48 received in tapped openings in ears'49 bent up from the outer edges of the brackets 17 of the detachable section 5. Crank arms 50 extend forward and downward from the rock-shaft 47 and are provided with laterally projecting pins 51. These arms 50 extend over pins 52 which project laterally from rearwardly extending parallel arms 53 of a sheet metal universal bar frame, suchas is shown in my application, Sr. No. 329,- 285, filed Oct. 8, 1919. The arms 53 of this frame are united by a cross bar 53, the frame being pivoted at 54 to depending ears 55 on the bars 7 of shift frame section 6, so

as to move fore and aft ofthemachine withv the latter. The arms 53 are connected by a universal bar 56 which extends across the machine beneath the printing key levers, not I shown.

Two levers 57 are pivoted at the same centers 54 on which the universal bar frame printing keys through the universal barframe independently of the space key. A spring 60, connected to one of the arms 50, returns the dog rocker to normal position, whether it is actuated from the space key or the printing keys.

From an inspection of Fig. 1 it will be 4 seen that the arms 49 terminate in hook-like portions where they overlie the pins 52. When detaching the detachable section of the shift frame, together with the parts carried thereby, the shaft 47 is first turned to lift the hooks off the pins 52, then the detachment may be effected, the forked ends of, the levers 57 not interfering with the a withdrawal of the pins 51.

The ribbon mechanism of the machine, as more fully disclosed in my application, Sr. No. 362,675, filed March 2, 1920, includes two ribbon spools 61 each of which is carriedby and turns freely on a spindle 62, carried by and projecting upward from an inwardly bent arm 63 projecting from a 1,aso,111

side bar 7 of the shift frame. A driving shaft 64 is supported in bearings in blocks or standards 65, each of which in effect may be regarded as part of the associated ribbon spool spindle 62. A gear 66 turns on each spindle 62 and coacts with a companion. pinion 67 on the shaft 64. The shaft 64 being longitudinally movable in its bearing blocks, either pinion 67 may be thrown into or out of mesh with its gear 66 to change the direction of feed of the ribbon. An upwardly extending lug 68 on each gear 66, extends into engagement with projections 69 on the lower flange of the associated ribbon spool, to cause the gear and spool to turn together.

In order to turn the shaft 64 intermittently at each printing operation, and thus effect a feed of the ribbon from one spool to the other, I provide a ratchet wheel 70 on the shaft. This ratchet wheel is engaged by 'a spring pressed pawl 71 pivoted to a carrier 72 mounted to vibrate on the shaft 64. An open mouth recess 73 in the pawl carrier receives a laterally projecting pin 74 on a sheet metal actuating arm 75 which is fixed to cross bar 53 of the universal bar frame. It will be understood that at each actuation of the universal bar, the pawl 71 will be actuated and a feed of the ribbon effected. It will be noted that the ribbon spools and all of their driving mechanism, down to and including the universal bar, are mounted on the section 6 of the shift frame.

In the present instance I employ carriage alarm and margin stop and line lock mechanism of the character disclosed in my application, Sr. No. 352,659, filed J an. 20, 1920.

Thus a bell 76 is secured by a screw 77 beneath the detachable frame section 5 to an ear 77- on said section. A bell hammer 78 is carried by a wire 79, secured to a spring returned sheet metal lever 80, pivoted by a shouldered pivot screw 81 to an arm 82 of a sheet metal bracket 82, which is secured by screws 83 to the carriage rails 22. An upwardly extending contact pin 84 is riveted to the sheet metal lever 80, and normally extends into the path of a bell trip pin 85, carried by a line lock stop block or slide 86 adjustable along a bar 87, carried by the carriage. A stop 88 (Fig. 2) on the slide 86, coacts with'a fixed stop 89 on the bracket 82 to arrest the carriage. A corresponding margin stop (not shown) on the bar 87 also coacts with the fixed stop 89, to arrest the carriage in its movement to the right. All of the bell ringer and carriage stop mechanism described above, is carried by the detachable section 5 of the shift frame.

From certain aspects of my invention any suitable means may be employed to move the case shift frame. In the present instance a case shift key 90 is carried by a key lever 91, fulcrumed on a fulcrum wire 92, which is supported by a fixed part of the machine,

secured to the side plates 3 of the supporting frame. An upwardly extending llIlk 93 is pivoted at its lower end, as at 94, to the key lever, and'at its upper end, as at 95, to a rearwardly bent off-set end of a sheet metal bell-crank lever 96. This lever is pivoted at 97 to the left-hand side plate 3. The depending arm of the lever 96 isslotted at 98 to receive apin 99 which is fixed to the left-hand Side bar 7 0f the shift frame. Therefore, a depression of the shift key turns the lever 96, and effects a rearward movement of the case shift frame and the parts carried thereby to the position shown in Fig. 2. -It will be seen that the upright parallel shift links 14 are arranged directly below the carriage, the fixed pivots 15 of the links being directly beneath the printing line. When the parts are in the shifted position shown in Fig. 2, the links are slightly over the dead centered position, a single plane substantially cutting the printing line, the axis of the platen and the pivots 13 and 15. The position of the links 14 is such that they are disposed opposite the printing line, and receive longitudinally thereof, and against their fixed pivots 15, the impacts of the bars on the platen, thus tending to reduce vibration of the platen. Moreover, these links are situated approximately beneath the center of gravity of the carriage and its rails, which enables said carriage and rails to be carried satisfactorily on a light sheet metal shift frame.

I In order to reduce the vibration of the platen when it returns to normal position and to assist in holding it firmly in its normal position, I employ an angular lever 100 pivoted on the left-hand side plate 3, by a shouldered pivot screw 101. The depending arm of this lever carries a laterally projecting pin 102 which extends into a slot 103 in the case shift key lever 91 This pin coacts with a cam 104 which forms one side Wall of the slot 103, the pin being normally seated at the lowest portion of the cam 104. The

other arm of the lever 100 is formed with a hook-like engaging portion 105, which coacts with the pin 99 on the shift frame when the parts are in the normal position, as shown in Fig. 1. The lever 100 thus tends, under the action of a contractile spring 106 connected thereto, to hold the shift frame against vibration in its normal position. When the shift key is depressed the cam 104 acts on the pin 102, forcing the lever 100 to turn on its pivot against the power of the spring 106, and to move the hook-like end of the lever out of engagement with the pin 99, and out of the path of movement thereof. A spring 107 returns the shift key to normal position after pressure thereon is released, and the lever 100 returns to its engaging position under the action of its spring 106.

The holding means just described are not of my invention and are not claimedherein.

In order to limit the movements 'of'the shift frame away from and back to normal position, I have provided at each side of the machine novel stop means, which comprise a yoke-like, sheet metal stop member 108 in the form of a closed, skeletonized figure, preferably, as here shown, substantially triangular. The stops 108 are trimmed out to skeleton form 1n the manner shown in order to diminish shock and noise. The closed skeletonized form of the stop 108 provides sufficient resiliency to reduce noise and effectively arrest the parts, and yet is stronger and less liable to be deformed in use than the free resilient tongues such as have heretofore been employed. Each member 108 is riveted at 109 to a side bar 7 of the shift frame, and extends upward therefrom. The open frame-like, substantially V- shaped, portion of each stop member, having inclined stop faces 110 thereon, is bent laterally to overlie-the associated side bar 7 and to brin it into cooperative relation with two coactlng stops 111. The two platelike stops 111 are arranged on opposite sides of the stop 108, each stop 111 being presented endwise of the metal in line with, and

adapted to coact at its inner end with one of the inclined faces 110. Each plate or stop 111 is mounted on a side plate 3 of the supporting frame by a pivot 112. This en- -ables each stop 111 to receive a swinging sition. The forward stop 111, as shown in Fig. 1, is at its highest point of adjustment, whereas the rear stop 111 is shown at its lowest point of adjustment. In order to hold each of the stops 111 in its adjusted position a headed set screw 113 is threaded into a tapped openin in the companion stop 111, the stem 0 the screw passing through a slot 114 in a side plate 3 and the head of the screw bearing against the outer face thereof and clamping the stop to the late. The case shift stop devices are sim le in construction, efiicient in use, occu y ut little s ace, are inexpensive to manu acture and e ect an arrest of the parts with but little noise and reduce vibration.

In order to lock the case shift frame in its shifted or upper case position, I provide the shift key lever with a forwardly extending locking projection l15- arranged below and parallel with the lever. A front cover plate 116 is secured to the comb plate ll 4, and in turncarries a sheet metal bracket member to and hold it in the position shown in Fig. 1, where it is free from contact with the. shift key lever and its projection 115. When, however, the lever 91 is depressed, as shown in Fig. 2, a depression of the key 120 will throw the locking projection 121 rearwardly against the comb plate and over the projection 115 of the case shift key lever, preventingthe latter from returning to its normal position until it is released from the locking member. Friction due to the power of the springs of the case shift mechanism, and the disposition of the locking member 119, prevent the latter from being returned to its normal position by the spring 122 so long as the projection 115 engages the looking member. When it is desired to have the case shift frame return to normal position, it is merely necessary to further slightly depress the locked case shift key 90, releasing pressure on'the member 119,'and the spring 122 of the latter will then be effective to return it to normal position, thus releasing the case shift key. 1

From the foregoing description it will be understood that the carriage and its escapement devices, the ribbon mechanism in its entirety, the spring drum for the carriage, the carriage bell and means for sounding an alarm thereon, and the margin stop mechanism are shiftable bodily with the shift frame in the case shift movements of the latter. And all of these parts except the ribbon mechanism are readily detachable bodily with the carriage as a single unit without any preliminary detachment, disconnection or removal of the parts, except to remove the screws 19 which secure the detachable section 5 of the shift frame in place in the machine. It will be understood moreover, that after effecting a detachment of the various parts as a unit, in the manner described, they may be readily restored as a unit to operative position'in the machine, and without altering or destroying the relative adjustment between the various parts which they had prior to such detachment of the parts. 1

The construction therefore is one which contributes not only to the production of a light, small, com act and highly efficient portable machine, ut to a machine-in which parts may be effectively assembled outside of the machine and readily introduced as a unit therein, and may be readily. detached inbefore referred to and are not claimed the combination of a carriage, a platen carried thereby, and means for affording a bodily case shift movement of the carriage fore and aft of the machine, said means including a shift frame, and a pair of parallel upright arms which support the rear end of said shift frame, said upright arrrs being pivoted at their lower ends to the rigid framework and being pivoted at their upper ends to the shift frame, the latter pivots being substantially in the same vertical plane with the axis of the platen when the latter is in both lower case position and upper case position while the first mentioned or lower fixed pivots are out of said vertical plane when the platen is in normal or lower case position but by reason of the shifting of the platen and the upper or shiftable pivots the said lower fixed pivots lie substantially in said vertical plane when the platen is moved to the upper case position whereby at this time said upright arms are substantially dead-centered relatively to the axis of the platen and the printing line.

2. In a top strike typewriting machine, the combination of a carriage, a platen carried thereby, and means for affording a bodily case shift movement of the carriage fore and aft of the machine, said means including a shift frame, a pair of parallel upright arms which support the rear end of said shift frame and are arranged beneath the carriage and assume substantially a dead centered position with reference to the axis of the platen and the printing line when the carriage iseshifted to the upper case position, and a second pair of upright parallel arms which support the forward end of the shift frame and which are arranged above the lattter.

3. In a typewriting machine, the combination of a carriage, a platen carried thereby, and means for affording a bodily case shift movement of the carriage, said means including a shift frame comprising two sheet metal sections, one supported for bodily.

case shifting movement and the other detachably fixed to and carried wholly by the first mentioned section and carrying as a'whole said carriage and parts associated therewith, whereby the detachable section together with the carriage as a whole and parts associated therewith may be detached as a single unit from the machine.

4. In a top strike typewriting machine, the combination of a, carriage, a platen carried thereby, a sheet metal case shift/frame section, aset of parallel arms connected to the forward end of said section and movable on fixed centers above said section, a second set of parallel arms connected to said section at the rear end thereof directly beneath the carriage and movable on fixed centers beneath said section, and a second sheet metal shift frame section detachably fixed to said first mentioned section and wholly supported thereby and wholly supporting said carriage, whereby the carriage and detachable section may be detached together,-as a single unit from the machine.

5. In a typewriting machine, the combination of a frame mounted on pivoted arms to receive a bodily case shift movement, said frame comprising two members one of which is carried wholly by the other member and detachable from the machine independently of said other member, and a carriage shiftable bodily with said frame in the case shift movements of the latter and mounted to travel on and to be detached with said detachable member of the frame.

, 6. In a typewriting machine, the combination of a frame mounted on-pivoted, arms to receive a bodily case shift movement, said frame comprising two members one of which is carried wholly by the other member and detachable from the machine independently of said other member, a carriage shiftable bodily with said frame in the case shift movements of the latter and mounted to travel on and to be detached with said detachable member of the frame, and a spring drum operatively connected to the carriage and which also is carried by and detachable with said detachable member of the frame.

7. In a typewriting machine, the combination of a frame mounted on pivoted arms to receive a bodily case shift movement, said 60 carriage shift movement, said frame comprising two members one of which is carried wholly by the other member and detachable from the machine independently of said other mem- 6 her, a carriage shiftable bodily with said frame in the case shift movements of the latter and mounted to travel on and to be detached with said detachable member of the frame, and carriage escapement devices 10 carried by and detachable with the detachable member of said frame,

9. In a typewriting machine, the combination of a frame mounted to receive a case shift movement, said frame comprising two members one of which is carried wholly by the other member and detachable from the machine independently of-said other member a carriage shiftable bodily with said frame in the case shift movements of the latter and mounted to travel on and to be detached with said detachable member of the frame, a feedrack carried by the carriage, feed dogs cooperative with said feed rack, and a dog rocker which carries said feed dog, said feed dogs and rocker being carried by and detachable with the detachable member of said frame.

10. In a typewriting machine, the combination of a frame mounted for case shift 80 movement and including one member detachably fixed to another member thereof, carriage guide rails secured to said detachable member, a carriage carried wholly by said rails, carriage escapement devices likewise carried wholly by said detachable member, and a universal bar carried by said frame and operatively connected to said escapement devices, said guide rails, carriage, and escapement devices being detachable as a unit with said detachable member.

11. In a typewriting machine, the combination of a frame mounted for case shift movement and including one member detachably fixed to another member thereof,

carriage guide rails secured to said detachable member, a carriage carried wholly by said rails, carriage escapement devices carried by said detachable member, and a bell and bell. ringer also carried by said detachable member, said guide rails, carriage,

escapement devices, bell and bell ringer being all detachable as a single unit with said detachable member; and a universal bar carried by said frame and operatively connected with said escapement devices.-

and operatively connected to said escape-- ment devices, ribbon spools and actuating means therefor also carried by said shift frame, and connections-for controlling said actuating means from the universal bar.

13. In a typewriting machine, the combination of a frame mounted for case shift movement and including one member detachably fixed to another member thereof, carriage guide rails secured to said detachable member, a carriage carried wholly by said rails, and carriage escapement devices and a spring drum for the carriage also carried by said detachable member, whereby the carriage, guide rails, escapement devices and spring drum may be detached from the machine as a single unit with said detachable member.

14. In a typewriting machine, the combination of a frame mounted for case shift movement and including one member detachably fixed to another member thereof, carriage guide rails secured to said detachable member, a carriage carried who'lly by said rails, and carriage escapement devices, a spring drum, a bell, and a bell ringer all carried by said detachable member and detachable from the machine therewith and with the carriage and rails as a single unit.

15. In a typewriting machine, the combination of a frame mounted for case shift movement and including one member detachably fixed to another member thereof; carriage guide rails secured to said detachable member; a carriage carried wholly by said rails; carriage escapement devices, a spring drum, a bell and a bell ringer all carried by said detachable member and detachable from the machine therewith and with the carriage and rails as a sin 1e unit; ribbon spools carried by the shift frame; a universal bar likewise carried by the shift frame; and means for rendering the universal bar operative on said escapement devices and ribbon spools without interfering with the detachment of the detachable member and the parts carried thereby.

16. In a typewriting machine, the combination of a frame mounted for case shift movement and including one member detachably fixed toanother member thereof, carriage uide rails secured to said detachable mem er, a carriage carried wholly by said rails, a feed rack carried by the carriage, feed dogs cooperative with said rack, and a rock-shaft mounted on said detachable member and carrying said feed dogs, whereby the carriage, rails, feed rack, feed dogs and rock shaft may all be detached from the machine as a single unit with said detach able member.

17. In a typewriting machine, the combination of a frame mounted for case shift movement and including one member detachably fixed to another member thereof, Carriage guide rails secured to said detachable member, a carriage carried wholly by said rails, a feed rack carried by the carriage, feed dogs cofjperative with said rack, a rock shaft mounted on said detachable member and carrying said feed dogs, whereby the carriage, rails, feed rack, feed dogs and rock shaft may all be detached from the machine as a single unit with said detachable member, a universal bar mounted to shift with the said shift frame, and 0 erative connections between the universal ar and said rock shaft which enable the detachable memher and the parts carried thereby to be detached independently of'the universal bar.

Si ed at Ilion, in the county of Herkimer 15 and tate of New York this 7th day of J anuary, A. D. 1920. r

JOSEPH B. HOLDEN.

VERNON E. J on'r 

